Maurice mathy



M. MATHY.

GRINDING TOOL.

APPLICATION FILED MAY 18. I915.

Patented Dec. 9, 1919.

MAURICE MATHY, 0F FLEMALLE GRANLDE, BELGIUM.

GBINDING-TUOL.

Specification of Letters Patent.

Patented Dee. t 119190 Application filed may 18, 1915. Serial. No.28,955.

To all whom it may concern:

Be it known that I, MAURICE MATHY, a subject of the King of Belgium,residing at Flemalle Grands, Belgium, 28 Rue Leopold, haveinventedcertain new and useful Tmprovements in Grinding-Tools; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedtherein, which form a part of this specification.

This invention has for its object a grinding tool adapted to be usedeither for grinding bottle necks or for rendering more regular the shapeof glass stoppers. This tool works by its rotation and consists of ahollow truncated cone, slit along one of its generating-lines. It isconstructed very economically by means of a piece of sheetiron suitablyshaped and bent- The bending of the sheet can be easily efi'ected byrolling the sheet on a metallic former.

The function of the aforesaid slit is first to allow the excess of waterand abrading agent to flow away, and on the other hand,

to allow the tool to be secured by its own elasticity on a rotaryspindle, without any other means. This elasticity of the sheet ismaintained, when grinding bottle necks, owing to the fact that thewooden former which supports the tool does not fill the whole length ofthe hollow of the sheet, so that the narrow end of the latter remainscompletely free.

A. rotary motion is imparted to the tool; besides, a relative motion ofthe tool and the part to be ground is imparted in a direction parallelto the axis of the shaft, said motion being regulated by the workman andcontinued until the part to be ground has obtained the dimensionsrequired. In certain cases, this relative motion is produced by movingthe rotary shaft itself, as will be explained hereinafter, in the caseof grind-- ing bottle necks, by way of example. In other cases, theshaft of the tool does not move parallelly to its axis, but the part tobe ground is pressed against the tool, as it will be explainedhereinafter in the case of working the glass stoppers.

Figure l is an end view of the tool.

Fig. is a longitudinal sectional elevation showing the tool when usedfor the grinding of bottle necks.

Fig. 3 is a side View of the apparatus used in this case.

Fig. t shows, partly in section, the apparatus intended for using thetool to form the glass stoppers.

.The tool consists of a piece of sheet-iron so shaped that it can bebent to form a hollow truncated cone 1, the decrement of which is thesame as the one of the bottle 2 or the stopper to be ground, and havinga slit 3 between the two edges of the sheet. Tt is quite possible tobend the sheet, the moment it must be used, upon the conical wooden plug4 intended for grinding bottle necks. This plug at is screwed on thetool-carrier 5 secured at the end of the vertical shaft 6 revolving inthe bearings 7 and 8 provided on the frame 9. The shoulder 11 of theshaft leans on the upper end of the bearing 8, which is slidably mountedin a socket 12 of the frame; the bearing 8 is provided with a rack 13engaging with a toothed wheel 14: mounted on a shaft with handles 15.The weight of the vertical shaft, bearing 8 and fittings is balanced bya counterweight 16 hung to a cable 17 that is fastened to the bearing 8and passes over suitable rollers 18. The shaft 6 is besides providedwith a pulley 19 by means of which said shaft can be driven for instanceby using an electric motor 20.

Under the rotary shaft is arranged the bottle 2, fastened by anysuitable means, in a bucket 21 forming a part of the frame 9. After theconical plug f has been provided with the bent sheet 1, an abradingagent, to which water is added, is fed to the neck 2;

by turning the handle wheel 15, the workman forces the rotary tool tomove downward; the excess of water and abrading powder flows downthrough the slit 3 into the bottle while the grains remaining be tweenthe sheet and the bottle neck grind the latter and produce in theinternal surface of the neck the minute spiral stripes that arenecessary when perfect stoppering is required.

When the same tool 1 is used for rendering more regular the shape ofglass stoppers. the sheet 1 is put in the cylindrical hole 22 of atool-carrier 23. lit remains lined in said hole 22 by its ownelasticity; the tool-carrier 23 is secured by any suitable means to ahorizontal shaft 24 journaled in bearings 25 of the frame 26. This shaft24 is driven at a speed that can be altered, by means of a step-pulley27. When the tool is revolving at the speed required, the workman putssome sand in the hollow sheet-iron cone, and then drives the stopper inthe hollow cone, holding fast the stopper in such a manner that the samecan not revolve with the tool.

What I claim is:

l. In a machine for grinding glass bottle necks or the stoppers thereof,an interchangeable tool comprising a hollow split truncated cone havingouter and inner grinding surfaces thereon, a member to neat-nee whichsaid cone is secured by its inherent resiliency when either grindingsurface is being used, and means for imparting angular and axialmovement to said cone.

2. A tool for grinding glass bottle necks and the stoppers thereof,comprising in combination a hollow slit truncated cone and a rotatingcarrier to which said cone is secured by its inherent resiliency.

In testimony whereof I affix my signature in presence of two witnesses.

MAURICE MATHY.

Witnesses:

Gnomes VANDER HUGHEN, HENRI JoYnNvn.

